How to see bundles and back projecting points of different colors?
Those red and green colored points are available only after you have successfully solved the scene.
To make them visible, enable the overlay in clip display &gt; Marker Display &gt; 3D markers

(for 2.79  enable 3D Markers on the Marker Display Tab.)

The dots show the difference between the tracker and where blender is actually laying the points in 3D space. It is a visual reference to help you identify problems and further refine your track to get a better camera solve. The colors reflect to the &quot;reprojection error&quot; If the rerpojected points are close to the original tracker they will show green,

Otherwise they will be red. Notice how the dots are away from where the tracker is.

Sometimes you can make the reprojected points fall closer to the original trackers by moving the optical center on the camera presets .

But if your reprojection errors are too high you might be dealing with errors on the focal lenght, the optical center or the radial distortion coefficients. So solve the scene again using those options in the refine section.
For more info on the last step see:
How to determine lens undistortion values for motion tracking?